There are the flashing bulbs of Reunion Tower. The scrolling kaleidoscope of images at the Omni. The blue stripes of AT&T's headquarters, and of course, the 72-story Bank of America Plaza, outlined with nearly 2 miles of green LEDs jutting into the night.

But what about those rare evenings when the Dallas skyline unites into one hue? The buildings are all red. Or all blue. Or solid gold. Or rainbow.

Those are some of José Carreon's favorite nights. The Dallas local who lives in Bishop Arts is always pleasantly surprised when he sees the skyline sync up. So he reached out to Curious Texas and asked: What is the process to get the Dallas skyline to match a nighttime color scheme?

Downtown Dallas buildings are lit in gold in honor of the #BeGolden campaign in Dallas on April 9, 2018.(Nathan Hunsinger / Staff Photographer)

"It was pure grit," Koenecke said. "It required a lot of calls to the most prominent building management folks, or leaders of big companies who are in those buildings, to get permission to change the color for the night."

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Adam Bernhardt echoed that sentiment. He's the vice president and general manager of Peloton Commercial Real Estate, and the man you need to speak with if you want Bank of America Plaza to glow anything but green.

"Changing the color is old-fashioned hustle," Bernhardt said. "When someone wants to coordinate the colors for the whole skyline, what they end up doing is tracking down and visiting with each of the properties involved."

For color purposes, Bank of America Plaza does not participate in corporate events, and will not accept money to change the lights. Rather, they'll participate in any light change for charity events in the Dallas community, or to celebrate holidays. The light change normally lasts for one night, and Bernhardt ask for at least a week's notice.

As for changing the whole skyline?

"You'll need more time," he said. "Maybe a couple months."

Bank of America and the Omni Dallas Hotel glow blue as the downtown Dallas skyline lights up in blue in recognition of National Police Week on May 15, 2017. (Smiley N. Pool / Staff Photographer)

This downtown alignment of colors is only a recent phenomenon. Reunion Tower swapped its traditional flashing yellow bulbs to colored ones in 2011. Two years later, Bank of America Plaza replaced its old light tubes with modern LEDs, allowing it to change colors.

Bernhardt estimated that the skyline aligns into one color roughly 15 to 20 times a year. It was all red for the American Heart Association in February, blue and yellow for Operation Blue Shield and rainbow for LGBT Pride Month in June.

Like Carreon, Bernhardt likes it when the city matches.

"Because it shows community," he said. "It shows that we're working together to further a cause, and that we'll support each other for the causes of the people in Dallas."

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The skyline of Dallas is aglow in blue on July 7, 2017 to remember the four Dallas police officers and one Dallas Area Rapid Transit officer killed in the 2016 police ambush.(Tom Fox / Staff Photographer)

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Brendan Meyer. Brendan has been a How We Live reporter at The Dallas Morning News since October 2016. Before that, he was a features reporter for the Casper Star-Tribune in Casper, Wyoming. He graduated from the Missouri School of Journalism in 2013.